Spherical Bowl and Dipole Geometry from experiments performed by Ericsson simulating the effects of a cellular telephone on the brain. A full copy of the research paper is also available.

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A liquid-filled spherical bowl exposed to radiation from a dipole antenna is simulated. The bowl is filled with a brain simulating liquid and an 835 MHz half-wave dipole radiates at a distance of 5 cm from the bottom of the sphere. Using XFDTD, the specific absorption rate (SAR) values in all planes of the liquid can be saved for viewing.Spatial "movies" of the SAR through the liquid may also be viewed as well as the maximum, whole-body average and maximum 1 and 10 gram averaged SAR values.

Figure 1, Figure 2, Figure 3, and Figure 4 are 3D and 2D views of the geometry and electric field displays as rendered in XFDTD.

XFDTD also provides data regarding the dipole antenna.This includes the steady state input impedance, input power and efficiency, and the S parameter S11 value at the input frequency. Antenna patterns of the dipole/sphere geometry also can be computed.

Recommended Reading:

Extensive comparisons of XFDTD impedance and SAR simulations of this geometry with experimental data are available in the following report: "Measurements and FDTD Computations of the IEEE SCC 34 Spherical Bowl and Dipole Antenna"